9. Inquiry Into Officers After They Visit Man Who Accused Police of Assault

The Internal Affairs Bureau at the New York Police Department is looking into an assertion that officers unlawfully entered and searched a Brooklyn apartment belonging to a man who had accused officers of assaulting him in his building, police officials said Thursday.

Parts of both instances were recorded by surveillance cameras set up by the man, Jabbar Campbell, a data recovery specialist who runs a recording studio in his home.

In the first episode, in January, Mr. Campbell said, officers kicked and punched him in the ground-floor hallway of the building in the Crown Heights neighborhood, bruising his face and cutting his lip. The recorded images did not show contact between Mr. Campbell and the officers, but a camera aimed at the front stoop showed a sergeant turning the lens to a wall before entering the building that night.

Last Friday, the surveillance cameras once again captured a visit to Mr. Campbell’s building, this time showing three men wearing Police Department jackets pushing open the building’s front door and later entering a room inside an apartment.

Dante Singleton, who shares the second-floor apartment with Mr. Campbell, said the officers entered by pushing open an unlocked door. He said that he asked the officers if they had a search warrant, and that they said they did not. They explained that they were responding to previous noise complaints, Mr. Singleton added.

“They said they had just so happened to be in the neighborhood and they decided to check it out, and that’s pretty much verbatim,” Mr. Singleton said.